Tool for assembling and disassembling chain



June 2, 1964 w. H. AITKEN 3,

TOOL FOR ASSEMBLING AND DISASSEMBLING CHAIN Filed Dec. 20, 196 4 Sheets-Sheet 2 j Z/ j M H M a g w HAS A t 6 0107495.

June 2, 1964 w. H. AITKEN 3,135,141

TOOL FOR ASSEMBLING AND DISASSEMBLING CHAIN Filed Dec. 20, 1961 4 Sheets-Sheet 3 June 2, 1964 w. H. AITKEN TOOL FOR ASSEMBLING AND DISASSEMBLING CHAIN Filed Dec. 20, 1961 4 Sheets-Sheet 4 MAJ- Zx-J HAS A t t 02'')? 6.

United States Patent 3,135,141 TOOL FOR ASSEMBLING AND DHSASSEMBLING CHAIN William H. Aitken, Park Forest, 11]., assignor to Remington Arms Company, Inc., Bridgeport, Conn, 21 corporation of Delaware Filed Dec. 20, 1961, Ser. No. 160,794 13 Claims. (Cl. 78-53) This invention relates to a bench-type device which is selectively operable to be used either as a chain breaking device or a rivet spinning device. More specifically, the invention is directed to a device which will facilitate breaking of chain and spinning of rivets by providing an adjustable anvil adapted to fit all sizes and types of chain to hold said chain in place while being worked upon and which provides for one set of tools which is selectively operable to be used as a chain breaker or a rivet spinner.

Chain saws, like other mechanical devices having many parts moving at high speed, break down at one time or other. Being used mainly by farmers, lumbermen, laborers, etc., who usually do not have elaborate repair facilities available to them, it becomes important to provide a portable, compact and durable device whereby repairs can be made quickly and efficiently in the field. The present device can be easily mounted on a work bench, a truck floor, a flat board or any flat member to which the device can be bolted or nailed.

A typical saw chain in use today includes a plurality of central drive link elements which are pivotally attached to one another by side linkelements mounted on both sides of said drive links. Cutter link elements are. positioned on alternate sides of said drive links and pivotally attached thereto. Allof the connections are made by rivets. In the event of failureof any of the link elements, the rivets attaching the faulty link must be punched out, a replacement link inserted, and a new rivet secured thereto.

Several problems are encountered in breaking and assembling chain, one of which is the problem of supporting the chain firmly on the anvil means while performing work thereon. Since there are various sizes of chains, some devices in use provide a plurality of anvil means,

vwhich are selectively mounted and positioned under a .punch means. These anvil means do not have any chain gripping facilities so that the chain must be held on the anvil means by hand. This creates a problem of not having enough hands to hold the chain on the anvil, apply necessary force to punch out the rivet and keep the chain from twisting. The twisting ofthe chain becomes more troublesome when the rivet head is being spun. This operation requires accurate alignment of the spinning punch and the rivet, exertion of a proper amount of force on the rivet shank and the application of .a rotary movement to the spinning punch. Improperjchain support, twisting of the chain, non-alignment of the spinning punch with .the rivet or an improper amount of force can result in an improperly spun rivet which, of course, will result in an early chain breakage. -Another problem in the punching operation occurs when punched-out scrap rings of metal which remain after the punching operation accumulate on the lower end of the punch and foul up the movement of the punch.

- It is an object of this invention to provide'a compact, durable. device which can be easily handled and set up -to be used as a combination chain breaker and rivet workpiece.

3,135,141 Patented June 2, 1964 which will free an operators hands from holding a workpiece on an anvil while work is being performed.

It is another object of this invention to provide a spinner anvil support which is adapted to provide improved support to a chain on which a rivet is being spun.

It is another object of this invention to provide a chain breaker device which can be used as a spinner handle.

It is yet another object of this invention to provide a chain breaker having an automatic scrap ring stripping device.

Other objects and advantages will appear in the following description, the appended claims, and the accompanying drawings in which:

FIGURE 1 is a side elevation view of the device with the spinner handle in place so that the device is set up for the spinning operation.

FIGURE 2 is a front elevation view of the device set up for the spinning operation.

FIGURE 3 is an exploded perspective view of the device.

FIGURE 4 is a sectional view showing the device being utilized to spin a rivet on a saw chain.

FIGURE 5 is a sectional view similar to FIGURE 4, showing a prior art spinner device.

FIGURE 6 is a sectional view similar to FIGURE 4, showing the device being utilized as a punching or chain breaking device.

FIGURE 7 is a perspective view showing the lower end of the spinner sleeve.

FIGURE 8 is an enlarged cross-sectional view showing the relationship of the various parts during the rivet punching operation.

Referring to the drawings, main frame 1 has a substantially C-shaped appearance, the lower base portion 2 having openings 3 by which the frame is rigidly secured to a work table or some other stable member (not shown). The lower portion further provides a built-up support block 4, the top of which is machined to provide a flat bearing surface 5. A groove 6is cut down from this hearing surface to almost the full height of the built-up block. Aperture 7 extends through said lower support block 4 and intersects groove 6 at approximately its midpoint.

Anvil assembly 8 (see FIGURE 3) is slidably mounted on block 4 in a manner which permits easy transverse movement of the anvil assembly and also prevents unwanted removal of said anvil assembly from said support block. Plate 9 slides in grooves 6 and is locked to block 4 by inserting stop pin 10 in opening 7 through a closed slot 11 provided in plate 9 and into the extension (not shown) of opening 7. p i

A spinner anvil support 12 ismounted at one end of sliding plate 9. The spinner support or block 12 has a slot 13 in which the upper portion of the plate 9 is placed, the plate then being fastened to block 12 by means of a pin 14 extending through a hole 15 in said spinner block and an aligned hole 16 in the plate. The slot 13 is deep enough so that the lower end of block 12 bears and slides (as explained below) on bearing surface 5.

One ofthe problems inpunching and spinning rivets on chain saws heretofore has been the difiiculty in securing the chain in place in order for the breaking or spinning device to work on the chain. In the breaking operation, the punch must be substantially lined up with the rivet in order to get the best results. Also, in the spinis a good chance that the rivet head will not be rounded oil evenly or have the head formed tightly against the The present invention appreciates these inadequacies and is ,designed to overcome them.

3 FIGURE 5, which shows a prior art device, shows that where'the'lower shank of the rivet is not spun or rounded tightly against the bottom surface of lower link 20, the onlysu por't which the chain has on anvil 21 is through shank 18 hearing against the bottom of cavity 19 The bottom surface of link 20 is vertically spaced from the top surface of anvil 21 and thus the link 20 is not supported at all on anvil 21. This, of course, means that the chain is very apt to twist and move upon a spinning force being exerted by spinner 22-.

A novel feature of the present invention is that a cavity 23 is formed in the spinner anvil of sufficient depth so that shank 18 has clearance in said cavity to permit the lower side link 20 to rest flush against the upper surface face 24 of anvil 12. (See FIGURE 4). It will be appreciated that this provides a much more solid support for the chain than that shown in FIGURE 5. The outer ends of cavity 23 are chamfered or inclined outwardly to provide a larger area 25 so that when the opposite shank 18 is being spun, the spun head of shank 17 will have 'suiiicient cavity area to provide maximum support for link element 26.

Also included in the anvil assembly and mounted on sliding plate 9 is an adjustable vise 27 which can function either as a punching anvil support or as a gripping means for the spinning operation. This vise consists of a lefthand jaw 28 and a right-hand jaw 29 which are held together on said sliding plate by an adjusting screw 30. The adjusting screw'has a forward portion 39a of lesser diameter than rear portion 3%, the forward portion having a left-hand thread and the larger rear portion having a righthand thread. The inner or right-hand jaw 29 provides an internally threaded opening having a left-hand thread and a diameter corresponding to the forward portion 30a of the adjusting screw 30. The outer or left-hand jaw provides an internally threaded opening having a right-hand thread and a diameter corresponding to the rear portion 30b. Dowels 33, to guide movement of the jaws, are mounted on the left-hand jaw 28 and inserted through aligned openings in the sliding plate 9 and right hand jaw 29. Sliding plate 9 has an-opening (not shown) of sufiicient diameter to permit the forward portion 30a to pass through but small enough to prevent rear portion 30b from moving through. After the adjusting screw is inserted through the openings in the jaws and the sliding plate, retainer rings 61 and 62 are inserted to prevent removal of the adjusting screw from the sliding plate. A small cross-pin 63 is mounted on the end of the adjusting screw to actuate the jaws inwardly and outwardly. The pin 63 ismade small purposely so that actuation of the screw is done with two fingers of the operators hand ment of the anvil and to prevent removal of the assembly from the support block 4. 7

It is to be understood that the adjustable jaws, when in gripping position, donot hold the lower link element against all movement. In order for the rivet to be punched'through saidupper link element26, it is necessary that said lower'link element 20 be permitted to move downwardly with thepunched-out rivet. It can be seen in FIGURES 6 and 8 that theinside gripping faces of jaws 28 and 29- are inclined slightly downwardly and outwardly to permit the'necessary downward movement of link 20 and'attached rivet 18. The angles of inclination are in thevicinity of 3 degrees although they are shown exaggerated in the drawing.

The vise jaws merely grip said lower link element to prevent horizontal movement or twisting of the chain. The central andup'per link elements of the chain cannot move downwardly with the punched-out rivet because the central link is supported on the surfaces 31 of the vise jaw's. (See FIGURE 6.) I

A force transmitting means in slidably and rotatably mounted on the upper portion 34 ofthe main frame 1. The upper part of portion 34 is bifurcated, as shown in FIGURE 2. A cam handle 34 is screwed or otherwise attached to a cam 36 which is pivotably mounted on a pivot pin 37 mounted on the bifurcated part of portion 34. A pin 3 8 is mounted on said upper frame portion rearwardly of pin 37 to act as a stop to limit pivoting of said cam handle in a direction opposite to the force exerting direction. By pivoting the cam handle downwardly, a force is exerted by the cam to a spherical ball 39 seated in a concave groove-of an elongated, vertically positioned shaft 40. The camming surface 36a and 36b of cam 36 have a varying angular relationship with the pivotal pin 37 which will be explained below. A collar 41 is mounted on the upper end of shaft 40 by a pin 42. A vertically extending opening 43 is provided in the upper'frame portion through which shaft 40 moves when a force is exerted on the shaft. It can be seen from FIG- URE 1 that the upper portion of opening 43 is slightly larger than the diameter of collar 41. The lower end of opening 43 having a lesser diameter than the upper end thereof acts as a stop for said collar and also acts as a bearing surface for the lower end of spring 44. Spring 44 biases collar 41 which, through pin 42, biases shaft and the ball upwardly against cam 36. The shaft thus is normally biased against the cam away from the anvil assembly.

A punch 45 is attached tothe lower bifurcated end of shaft 40 so that the punch moves integrally with the shaft. This attachment comprises an attaching pin 46 which extends through apertures 47 in said shaft and an aperture 48 through said punch 45. From FIGURE 1 it can be seen that the attaching pin 46 extends outwardly of said shaft.

Mounted over the punch and the lower end of said shaft and slidably movable thereto is a spinner sleeve 49. Removal of said sleeve from the shaft and punch is prevented by providing aligned closed slots 50 in said sleeve through which attaching pin 46 protrudes. It can be seen that the pin 46 slides in'slots 50 and that this feature not only prevents removal of said sleeve from said punch and shaft but also limits sliding movement of said sleeve relative to said punch and shaft. Spring 51 bears against the upper end of sleeve 49 and a pin 52 inserted through said shaft to bias said sleeve downwardly toward said anvil assembly. Note that in the normal position, pin 46 rides against the upper end of slots 50 (FIGURE 1). Openings 53 are provided in the upper portion of said sleeve aligned with an opening 54 in the lower end of said shaft when in the normal position shown in FIGURE 1. An elongated spinner handle 55 with a knob 56 at the end thereof is inserted through said aligned openings 53 and 54 in order to prevent relative movement of the sleeve and shaft for a purpose to be explained below.

The lower end of the sleeve istapered to provide a smaller diameter sleeve end portion 57 having an opening 58 through which the lower end of said punch may extend. It can be seen from FIGURES l and 4 that said opening 58 is just slightly larger than the diameter of the lower end of the punch. The sleeve end portion 57 has four equally spaced concave edges 59 which constitute forming means (seeFIGURE 7). It can be seen in FIGURES 1 and 4 that the lower edge of the punch is approximately flush with the forming edges 59 of the sleeve when the device is'set for the spinning operation. The combination of said forming edges with the lower edge of the punch constitutes the spinning means. In

order to prevent the spinner handle 55 from becoming misplaced when not inserted in the openings in the shaft and sleeve, a hole 60 is placed in the lower frame portion to accommodate said spinner handle. (See FIG- URE 1.

Operation The device, as explained above, can be used either as a breaking device or a spnning device, Moreover, although disclosed as a chain breaking and spinning device, it must be understood that the present invention has utility in environments other than a chain.

In the event it becomes necessary to remove a rivet from a chain in order to replace a defective part of said chain, the lower link element 20 is gripped by adjustable jaws 28 and 29 so that the central drive link element 32 is fully supported on the upper surface areas 31 of said jaws. Spinner handle 55 is removed in order to permit relative movement of said shaft 40 and sleeve 49. The anvil assembly 8 is then slid in groove 6 until the rivet to be punched out is centered beneath the punch. The cam handle is then pivoted to force shaft 40 and thus sleeve 49 downwardly until the sleeve engages the upper link element 26. At this point, sleeve 49 is held against upper link element 26 by spring 51. Upon further movement of the cam handle, the shaft is urged against the bias of spring 51 to move punch 45 through opening 58 and punch out the rivet. Upon reverse movement of said cam handle 35, said punch retracts through opening 58 and the narrow fit of the opening with the punch permits the sleeve to strip off any scrap ring of metal which remains after the punching operation and which may accumulate on said punch if not removed. The accummulation of scrap rings on a punch can be very troublesome and thus, the automatic stripping means is an important novel feature of the present invention.

After the rivet is removed and the defective part replaced, it may be necessary to rivet the parts together again. This can be done by gripping a forward portion of the chain to said adjustable vise or anvil and positioning the rivet to be spun on the spinner anvil. The entire anvil assembly is then slid in groove 6 until the spinner anvil is directly beneath the punch.

The spinner handle 55 is then inserted in openings 53 and 54 to secure the shaft and sleeve means against relative movement. The cam handle is again moved to force the shaft and sleeve downwardly. Since the chain is firmly held in place by the vise, one of the operators hands can manipulate the cam handle to exert the proper amount of force while the other hand can manipulate the spinner handle in order to provide the necessary spinning operation. Because of the four forming edges, it is not necessary to rotate the spinning means 360 in order to make a rounded rivet head but instead, the operation can be done by oscillating the spinning means 90 and back again. During this operation, it is desirable to apply a suitable heavy lubricant to the rivet head.

As mentioned above, a varying angular relationship exists between pin 37 and camming surfaces 36a and 35b (see FIGURE 1). The normal position of handle 35, in which spring 44 is not compressed, is when the handle 35 rests on pin 38. The force exerting direction of the handle thus is in the counter-clockwise direction. (As illustrated in FIGURE 1.) However, the angle of cam surface 36a relative to pin 37 is considerably larger than the angle of cam surface 365. Theetfect of this is that when handle 35 is moved counter-clockwise (i.e., in FIG- URE 1), to an approximate vertical position and the device is ready to perform the spinning operation, the relatively larger angular portion of the cam surface has been traversed and a relatively small amount of force exerted downwardly. This is desirable so that excessive force is not exerted on the rivet head. After the handle passes the point shown in FIGURE 1 moving counter-clockwise, the relatively small angled portion of the cam surface is traversed with a resulting relatively large force being exerted downwardly against the ball 39, Again, this result is desirable in the punching operation when a large force is required.

What is claimed is:

1. A combination chain breaker and spinner comprising a main frame having upper and lower portions, an adjustable anvil assembly including a punching anvil support means and a spinner anvil support means, force transmitting means slidably and rotatably mounted on said upper frame portion, said force transmitting means including outer sleeve means slidably movable on inner shaft means, punch means on the lower end of said shaft means, forming means on the lower portion of said sleeve means, said anvil support means being selectively movably mounted on said lower portion to position one or the other of said support means under said force transmitting means, means selectively operable to secure said shaft means and said sleeve means to each other with the end of said punch means in fixed relation to said forming means so that the lower end surfaces of said punch and forming means define a rivet spinning surface whereupon by selectively looking or unlocking said shaft means and said sleeve means and positioning a workpiece on the appropriate support means, a force can be exerted through said force transmitting means to punch out or to spin a rivet as desired.

2. A device as recited in claim 1 wherein said punching anvil support means includes an adjustable gripping means whereby said workpiece is held in place while work is being performed.

3. The combination recited in claim 1 wherein means is provided to exert a force to said force transmitting means, said shaft and sleeve securing means including aligned apertures in said shaft and sleeve means and a sliding pin means insertable in said apertures, said sliding pin means also functioning as a handle means to rotate said force transmitting means when the device is adapted for the spinning operation.

4. A combination as recited in claim 1 in which said forming means comprises a lower end portion of said sleeve means having an opening therein, said opening having a diameter slightly larger than the diameter of said punch means, and at least four curved deforming means spaced along the lower edge of said lower end portion of said sleeve means.

5. In a rivet punching device wherein a rivet is punched out of its position fastening upper and lower link elements with a central link element positioned therebetween, the combination of a main frame having upper and lower portions, force transmitting means slidably mounted on said upper portion to exert a punching force on the top 'of said rivet, adjustable viselike anvil means, means slidably mounting said adjustable anvil means on said lower portion, said anvil means being adapted to grip said lower link element to restrict movement of said lower link element relative to said anvil means, the lower surface of said central link element being supported by the upper surface of said anvil means.

6. The combination as recited in claim 5 wherein said adjustable anvil means includes a pair of relatively movable gripping jaws, each jaw having an upper flat surface which forms a support area for said central link element when said jaws are moved to grip said lower link element, and further including means to move said jaws intoand out of gripping position.

7. The combination as recited in claim 5 in which said adjustable anvil mounting means includes an upper bearing surface on said lower frame portion, groove means in said bearing surface extending transversely of the longitudinal axis of said main frame, elongated vertically positioned plate means slidable in said groove means, means limiting sliding movement of said plate means in said groove means and preventing its removal therefrom, and means mounting said adjustable anvil means on said plate means.

8 The combination as recited in claim 7 in which said limiting means includes elongated, closed slot means in said plate means, a stop pin seated in an opening parallel to andbeneath the plane of said bearing surface in said lower frame portion at an angle to said plate means, said pin extending through said slot means.

9. The combination recited in claim wherein said lower frame portion includes an upper bearing surface, groove means in said bearing surface extending transversely of the longitudinal axis of said main frame, elongated, vertically positioned plate means slidable in said groovemeans, means limiting movement of said plate means in said groove means and preventing removal therefrom including elongated, closedslot means in said plate means, stop pin means mounted in an opening parallel to and beneath the plane of said bearing surface in said lower frame portion at an angle to said plate means, said stop pin means extending through said slot means, said adjustable anvil means including a pair of relatively movable gripping jaws, slidable on said bearing surface, each jaw having an upper flat surfacewhich forms a support area for said central link element when said jaws are moved to grip said lower link element, means'to move said jaws into and out of gripping position, said force transmitting means comprising an elongated, vertically positioned shaft means slidably mounted on said upper frame portion, means biasing said shaft in a direction away from said anvil means, punch means connected to the lower end of said shaft means, sleeve means slidably mounted over said punch means and the lower end of said shaft means, means biasing said sleeve means downwardly, the lower end of said sleeve means having an opening whose diameter is slightly larger than the diameter of said punch means and through which said punch means moves when a downward force is exerted on said force transmitting means.

10. The combination recited in claim 5 in which said force transmitting means comprises an elongated vertically positioned shaft means slidably mounted on said upper frame portion, means biasing said shaft means in a direction away from said anvil means, punch means connected to the lower end of said shaft means, sleeve means slidably mounted over said punch means and the lower end of said shaft means, means biasing said sleeve means downwardly, an opening at the lower end of said sleeve means of a slightly larger diameter than the diameter of said punch means and through which said punch means moves when a force is exerted on said force transmitting means.

11. In a rivet spinning device wherein upper and lower link elements and a central link element positioned therebetween are securely fastened together by inserting a rivet through said elements, applying pressure to a shank of said rivet and spinning a rounded head on said rivet shank, the combination of a main frame having upper and lower frame portions, an anvil assembly mounted on said lower frame portion, said assembly including spinner anvil means and an adjustable vise-like gripping means, force transmitting means vertically movable and rotatable on said upper frame portion including spinning means mounted at the lower end of said force transmitting means, means to exert a force to said force transmitting means to bring said spinning means into force applying relationship with said rivet, separate 'means to rotate said spinning means while said force is beingexerted on said rivet, said anvil assembly being slidably mounted on said lower frame portion, said adjustable clamping means including two movable jaws means adapted to grip one portion of a workpiece and permit the spinning operation to be performed on another portion of the workpiece which is mounted on said spinner anvil means.

12. In a rivet spinning device wherein upper and lower link elements and a central link element positioned therebetween are securely fastened together by inserting a rivet through said elements, applying pressure to a shank of said rivet and spinning a rounded head on said rivet shank, the combination of a main frame having upper and lower frame portions, an anvil assembly mounted on said lower frame portion, said assembly including spinner anvil means, force transmitting means vertically movable and rotatable on said upper frame portion including spinning means mountedat the lower end of said force transmitting means, means to exert a force to said force transmitting means to bring said spinning means into force applying relationship with said rivet, separate means to rotate said spinning means while said force is being exerted on said rivet, said spinner anvil means comprising an anvil member having an upper, flat support face, a cavity extending inwardly of said support face, said cavity being chamfered at its outer end to provide a larger diameter recess at the intersections of said cavity with said support face, said cavity being of sufficient depth to permit an unspun rivet shank opposite to the shank being spun to project into said cavity so that said lower link element is supported firmly on said support face while said rivet is being spun.

13. In a rivet spinning device wherein upper and lower link elements and a central link element positioned therebetween are securely fastened together by inserting a rivet through said elements, applying pressure to a shank of said rivet and spinning a rounded head on said rivet shank, the combination of a main frame having upper and lower frame portions, ananvil assembly mounted on said lower frame portion, said assembly including spinner anvil means, force transmitting means vertically movable and rotatable'on said upper frame portion including spinning means mounted at the lower end of said force to transmitting means, means to exert a force to said force transmitting means to bring said spinning means into force applying relationship with said rivet, separate means to rotate said spinning means while said force is being exerted on said rivet, said force transmitting means including a vertically slidable shaft means rotatably mounted on said upper frame portion, sleeve means mounted about the lower end of said shaft means, the lower end periphery of said sleeve means being provided with at least four arcuate forming edges to form a rounded rivet head by exerting force on a rivet head and oscillating said shaft and sleeve means while said force is being applied. means to exert force on said force transmitting means and separate means to oscillate said' shaft and sleeve means.

References Cited in the file of this patent UNITED STATES PATENTS 345,635 Hunter July 13, 1886 1,196,656 Bugbee Aug. 29, 1916 1,430,692 Seng Oct. 3, 1922 1,675,773 Tissler July 3, 1928 2,308,493 Rentiis Jan. 19, 1943 2,671,310 Noack Mar. 9, 1954 2,747,362 Cox May 29, 1956 2,774,212 Jacobs Dec. 18, 1956 3,063,236 Cannon Nov. 13, 1962 FOREIGN PATENTS 1,425 France Apr. 24, 1823 9 Great Britain Ian. 1, 1891 482,744 Italy July 8, 1953 

1. A COMBINATION CHAIN BREAKER AND SPINNER COMPRISING A MAIN FRAME HAVING UPPER AND LOWER PORTIONS, AN ADJUSTABLE ANVIL ASSEMBLY INCLUDING A PUNCHING ANVIL SUPPORT MEANS AND A SPINNER ANVIL SUPPORT MEANS FORCE TRANSMITTING MEANS SLIDABLY AND ROTATABLY MOUNTED ON SAID UPPER FRAME PORTION, SAID FORCE TRANSMITTING MEANS INCLUDING OUTER SLEEVE MEANS SLIDABLY MOVABLE ON INNER SHAFT MEANS, PUNCH MEANS ON THE LOWER END OF SAID SHAFT MEANS, FORMING MEANS ON THE LOWER PORTION OF SAID SLEEVE MEANS, SAID ANVIL SUPPORT MEANS BEING SELECTIVELY MOVABLY MOUNTED ON SAID LOWER PORTION TO POSITION ONE OR THE OTHER OF SAID SUPPORT MEANS UNDER SAID FORCE TRANSMITTING MEANS, MEANS SELECTIVELY OPERABLE TO SECURE SAID SHAFT MEANS AND SAID SLEEVE MEANS TO EACH OTHER WITH THE END OF SAID PUNCH MEANS IN FIXED RELATION TO SAID FORMING MEANS SO THAT THE LOWER END SURFACES OF SAID PUNCH AND FORMING MEANS DEFINE A RIVET SPINNING SURFACE WHEREUPON BY SELECTIVELY LOCKING OR UNLOCKING SAID SHAFT MEANS AND SAID SLEEVE MEANS AND POSITIONING A WORKPIECE ON THE APPROPRIATE SUPPORT MEANS, A FORCE CAN BE EXERTED THROUGH SAID FORCE TRANSMITTING MEANS TO PUNCH OUT OR TO SPIN A RIVET AS DESIRED. 